python编程从入门到实践第四章习题

4.1

pizza = ['a' , 'b' , 'c' ]
for ele in pizza :
print( ele + " . I like pepperoni pizza." )
print( "They are delicious, I like them" )

4.2

animals = ['dog' , 'cat' , 'bird' ]
for ele in animals :
print( "A " +ele + " would make a great pet" )
print( "Any of these animals would make a great pet" )

// range 的第三个参数//列表解析： num = [ v**2 for v in range(1,11) ]#4.3

for i in range(1,21) :
print( i )
#4.4-4.5
nums = range( 1 , 1000001 )
for ele in nums :
print ( ele )
print ( min(nums) )
print ( max(nums) )
print ( sum(nums) )

#4.6
old = list( range(1,21,2) )
for ele in old :
print( ele )
#4.7nums = range( 3,31,3)
for ele in nums :
print ( ele )

#4.8
nums = []
for i in range(1,11) :
nums.append( i**3 )
for ele in nums :
print ( ele )
#4.9
nums = [v**3 for v in range(1,11) ]
for ele in nums :
print( ele )

#4.10
old = list( range(1,21,2) )
print("The first three items in the list are:" , end = '' )
print( old[:3] )
print ( "Three items from the middle of the list are:" , end = '' )
print( old[2:5] )
print( "The last three items in the list are:" , end = '' )
print( old[-3:] )

#4.11
pizza = ['a' , 'b' , 'c' ]
friend_pizza = pizza[:]pizza.append("D" )friend_pizza.append( 'E' )
print( "My favorite pizzas are: ")for ele in pizza :   print( ele )
print( "My friend's favorite pizzas are: " )for ele in pizza :   print( ele )

#4.13foods = ('apple' , 'banana' , 'cake' , 'dog' ,'egg' )foods[1] = 'pear'foods = ('apple' , 'banana' , 'cake' ,'d' ,'e' )for ele in foods :       print( ele )